CN111904472A

CN111904472A - Single type uterine cavity electric cutting device

Info

Publication number: CN111904472A
Application number: CN202010642586.7A
Authority: CN
Inventors: 张重医
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2020-11-10

Abstract

The invention discloses a single type uterine cavity electric cutting device which comprises: including dead lever, traction wire, cutting electrode, tensioning wire and handle, make the traction wire move along the direction sliding sleeve on the dead lever through opening and shutting the handle to the supporter that control and traction wire are connected, and under the restraint of the pullback of tensioning wire, drive the cutting electrode and accomplish and open, draw in and change and open the angle. When the cutting electrode is moved in and out of the uterine cavity, the cutting electrode can be folded under the operation of the handle, so that the electric cutter is easy to move in and out of the uterine cavity and is not easy to damage the cutting electrode; the angle of the cutting electrode can be flexibly and accurately adjusted in a larger range during treatment, the treatment effect is better, and the operation process is safer. The invention can not only reduce the treatment cost and time, but also reduce the treatment pain degree, and provides convenient conditions for completing corresponding operation in outpatient clinics.

Description

Single type uterine cavity electric cutting device

Technical Field

The invention relates to an electric cutting instrument of a hysteroscope operation treatment system, in particular to a single type hysteroscope electric cutting ring and an electric cutting needle which can be separated from a hysteroscope.

Background

In the resectoscope, an electric cutting instrument such as an electric cutting ring and an electric cutting needle is usually wrapped with an endoscope, and a cutting electrode and an operating rod of the electric cutting ring and the electric cutting needle are fixed perpendicular to each other, so that the electric cutting ring and the electric cutting needle need to be retracted into the resectoscope in order to avoid damage to the cutting electrode and other parts (for example, when the cutting electrode enters and exits from an external cervical orifice, a cervical canal and an internal orifice) in the uterine cavity treatment process. Therefore, the resectoscope is thicker, the uterus needs to be expanded to 8-11mm when in use, and the larger the uterus expansion is, the greater the damage to the cervix is, and the higher the possibility of cervical insufficiency caused by the operation is. Meanwhile, the resectoscope has fine structure and high price, and is easy to damage in operation, so that the wide-spread hysteroscope operation in outpatient service faces a plurality of limiting factors.

Because the electric cutting ring and the electric cutting needle in the electric cutting endoscope are fixed with the operating rod, the angle can not be independently adjusted in the electric cutting treatment, when polyp, uterine cavity adhesion and submucosal myoma are found in a uterine cavity in the hysteroscopy process, not only is the electric cutting operation complex, but also the required electric cutting time is increased along with the increase of a focus (for example, larger submucosal myoma), so that the probability of complication hyponatremia and water poisoning is obviously increased, and the difficulty in carrying out the hysteroscopy operation in an outpatient service is increased.

Chinese patent CN208426206U discloses a foldable electrode resectoscope, wherein, the resectoscope utilizes a spring to connect a cutting electrode and a metal sleeve, so that the cutting electrode can rotate at a certain angle, and the cutting can be completed by pushing and pulling, thereby improving the operation efficiency of renal cyst topping decompression. However, the electric cutting instrument and the endoscope are still in an integrated structure, the electric cutting scope is large in size, meanwhile, the spring part belongs to the electric conductor and is connected with the cutting electrode into a whole, and the electric cutting scope also has a cutting effect, so that when the electric cutting scope is used for an operation in a uterine cavity, the electric cutting scope needs to be large in uterine dilating size, normal tissues beside a focus are easily accidentally injured in the operation, and the risk of complications is increased.

At present, no report of a single type uterine cavity electric cutting device matched with an independent hysteroscope is seen at home and abroad.

Disclosure of Invention

The invention aims to provide a single type uterine cavity electric cutting device.

In order to achieve the purpose, the invention adopts the following technical scheme:

the electric cutter comprises a fixing rod, a traction wire, a cutting electrode and an operating handle, wherein a guide sliding sleeve and a support body capable of swinging towards any end (for example, the front end and the rear end) of the fixing rod are arranged on the fixing rod, the operating handle is arranged at one end (for example, the rear end) of the fixing rod, two ends of the traction wire respectively extend and are connected to the operating handle and the support body along a return channel formed by the guide sliding sleeve outside the other end (for example, the front end) of the fixing rod, a tensioning wire with one end extending outwards and connected to the support body is arranged in the fixing rod, the cutting electrode is arranged on the support body, and the cutting electrode is connected with.

Preferably, the guide sliding sleeve includes a bent tube body and a straight tube body connected to each other, the inner concave side of the bent tube body covers one end (e.g., the front end) of the fixing rod, and the straight tube body extends to the other end (e.g., the rear end) of the fixing rod where the operation handle is provided.

Preferably, the supporting body is in the shape of a cambered surface shell, one end of the supporting body is in pin joint with the fixed rod, the other end of the supporting body is connected with the annular electrode, one end of the cable is connected with a leading-out electrode arranged inside or on the outer surface of the fixed rod, a main body of the cable is arranged inside the fixed rod, and the other end of the cable extends to the connecting position of the annular electrode and the supporting body.

Preferably, the support body is hollow cylinder, one end of the support body is in pin joint with the fixed rod, the other end of the support body is connected with the needle electrode, one end of the cable is connected with the extraction electrode arranged inside or on the outer surface of the fixed rod, the main body of the cable is arranged inside the fixed rod, and the other end of the cable extends to the support body.

Preferably, the operating handle includes a pair of handles hinged to each other, the tension wire being connected to the handle in which it is engaged at a corresponding end (e.g., a rear end) of the fixing rod, and the other handle being connected to the traction wire.

Preferably, the cross-sectional dimension of the fixing bar is gradually reduced in a direction from one end (e.g., a rear end) of the fixing bar, at which the operating handle is provided, to the other end (e.g., a front end).

Preferably, the swing angle of the supporting body is 30-120 degrees.

Preferably, the cutting electrode has a diameter of 0.5 to 1.5 mm.

The invention has the beneficial effects that:

the electric cutting device can move the traction wire along the guide sliding sleeve on the fixed rod by opening and closing the operating handle, thereby controlling the support body connected with the traction wire and driving the cutting electrode (such as a needle electrode and a ring electrode) to complete opening, closing and changing the opening angle under the restraint of the back-pull or the traction of the tension wire. The cutting electrode can be folded when the uterine cavity is accessed, the electric cutter can still be easily accessed to the uterine cavity under the condition of not needing to expand the uterine or reducing the size of the uterine, and the cutting electrode is not easy to damage. In the hysteroscopic treatment, the hysteroscopy lens and the electric cutter can be respectively held and mutually matched to finish the operation, so that not only can the operation of excision of the focus (polyp, adhesion of uterine cavity and myoma under mucosa) at different angles and depth positions (larger operation range and stronger flexibility) in a certain visual field be continuously finished by a doctor, the operation of the treatment process is simple, the better treatment effect is achieved, and the operation process is safer. Meanwhile, the popularization and the application of the invention can also reduce the cost of the instrument (the price of the existing integrated resectoscope is far higher than that of a single resectoscope), the treatment cost and time, relieve the pain degree of treatment and complete the corresponding operation in outpatient service.

Furthermore, when the invention is applied to the hysteroscope vaginal endoscope technology, different opening angles (for example, 45-120 degrees) of the cutting electrode are formed by operating the swing angle of the support body according to the size of a focus, so that the invention not only can perform electrotomy treatment on polyp, intrauterine adhesion, submucosal myoma and the like in the uterine cavity, but also can provide effective electrocoagulation hemostasis for the bleeding of small blood vessels in the uterine cavity.

Furthermore, the invention can realize the maximization of the cutting tissue by adopting the cutting electrode with larger diameter, thereby shortening the operation time and reducing the risk of complications such as water poisoning and the like.

Furthermore, in the invention, the operating handle of the electric cutter is positioned at the thicker rear end of the fixing rod, the fixing rod is tapered towards the direction of the front end of the fixing rod, and the front end of the electric cutter can enter (for example, along the hysteroscope body) more easily and pass through a narrower part (for example, an internal cervical opening) in the uterine cavity during treatment, thereby improving the operation efficiency of the operation.

Furthermore, the cambered surface shell-shaped or hollow cylindrical support body adopted in the invention is matched with flexible angle adjustment, so that the electrotomy of the non-cutting electrode on the tissue is effectively reduced, and the damage and the injury of misoperation to the normal tissue in the electrotomy are avoided.

Drawings

FIG. 1 is a front view of a one-piece electrotomy ring of example 1 (30 degrees when the ring electrode is collapsed);

FIG. 2 is a schematic view showing the connection between the support and the ring-shaped electrode in example 1 (from the side of the fixing rod);

FIG. 3 is a schematic view of the cable connection in example 1;

FIG. 4 is a front view of the one-piece resectoscope of example 1 (with the ring electrode open at 90 degrees);

FIG. 5 is a schematic view showing the connection between a support and a ring electrode in example 1 (view of the end face of a fixed rod);

FIG. 6 is a front view of the one-piece resectoscope of example 1 (with the ring electrode open at 120 degrees) with (a) not showing the tensioned wire section within the fixation rod and (b) showing the tensioned wire section within the fixation rod;

fig. 7 is a front view of the one-piece electrosection needle of example 2 (30 degrees when the needle electrode is closed);

fig. 8 is a front view of the one-piece electrosection needle in example 2 (when the needle electrode is opened at 90 degrees);

FIG. 9 is one of the schematic views showing the connection between the support and the needle-like electrodes in example 2;

FIG. 10 is a second schematic view showing the connection between the support and the needle-like electrode in example 2;

FIG. 11 is a schematic view of cable connection in example 2;

fig. 12 is a front view of the one-piece electrosection needle in example 2 (when the needle electrode is opened at 120 degrees);

in the figure: 1-1 is a first handle body, 1-2 is a second handle body, 1-3 handle connecting parts, 1-4 is a traction wire, 1-5 is a fixed rod, 1-6 is a tensioning wire, 2 is a guide sliding sleeve, 3 is a support body, 3-1 is a movable connecting point, 3-2 is a fixed connecting point, 4 is an annular electrode, 5 is a cable, 6 is a leading-out electrode, and 7 is a needle electrode.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

The current used hysteroscope resectoscope is cylindrical with a diameter of more than 8mm, which is developed from male prostate resectoscope, but the male urethra system has a great difference with the female vagina and uterine reproductive system. The invention separates the uterine cavity examination system of the resectoscope from the resectoscope system in order to well utilize the physiological structure of the female, and improves the structure of the resectoscope system, thereby forming a single-body resectoscope system, the cutting electrode of which can effectively avoid the tissue from being rubbed in and out of the uterine cavity, and simultaneously can play a role in treatment in a larger range under the coordination of the resectoscope, thereby better utilizing the physiological structure of the female to treat, reducing the difficulty and cost of the treatment and relieving the pain degree of the patient.

Example 1

Referring to fig. 1, 3 and 6b, the single body type electric cutting ring provided in this embodiment includes a handle, a fixing rod 1-5, a plurality of flexible wires (e.g., synthetic fibers such as nylon, high molecular polymer such as PE, metal alloy material such as titanium steel) with certain strength and capable of being bent freely, and a circuit loop system. The handle comprises a first handle body 1-1 and a second handle body 1-2 which are connected (hinged) through a handle connecting part 1-3, the first handle body 1-1 is clamped and fixed with the rear end of a fixed rod 1-5, the second handle body 1-2 is connected with a section of the flexible wire and is used as a traction wire 1-4, the traction wire 1-4 passes through a guide sliding sleeve 2 which is integrally positioned at the upper part of the fixed rod 1-5, the traction wire 1-4 is horizontally led out from the second handle body 1-2 and extends towards the front end of the fixed rod 1-5, the front end of the traction wire 1-4 passes through a bending section (a section of bending pipe body) of the guide sliding sleeve 2 which is tightly attached to the outer side of the front end of the fixed rod 1-5, so that the traction wire can be bent (along the bending pipe body) to turn back a certain distance towards, and finally connected with a movable support body 3 (cambered surface shell shape) connected near the front ends of the fixed rods 1-5. The other section of the flexible wire rod is extended from the inside of the fixing rod 1-5 in a direction toward the front end of the fixing rod 1-5 and is connected to the supporting body 3, and the specific connection position can be selected at the back side of the connection position of the traction wire 1-4 and the supporting body 3, and the section of the flexible wire rod penetrates one end of the fixing rod 1-5, can reach the rear end of the fixing rod 1-5 along the inside of the fixing rod 1-5, and is connected with a spring preset in the inside of the fixing rod 1-5, thereby forming the back tension tensioning wire 1-6. Without a pre-set spring, the flexible wire may be unwound and wound using a wire winding mechanism (e.g., a knob that may be fixed) disposed on the fixed rod 1-5 or the first handle 1-1 to form a pull tension wire. The circuit loop system comprises an annular electrode 4 arranged on a support body 3 (in a cambered surface shell shape), a cable 5 with a main body embedded in fixing rods 1-5, a positive leading-out electrode 6 and a negative leading-out electrode 6, wherein the leading-out electrode 6 is connected with an external control circuit through wiring holes in the fixing rods 1-5, one end of the cable 5 is respectively connected with the positive leading-out electrode 6 and the negative leading-out electrode 6, and the other end of the cable is led out of the fixing rods 1-5 and is connected with two ends of the annular electrode 4.

Referring to fig. 1, 2 and 5, the support body 3 is formed by processing a cambered shell cut from the side surface of the circular truncated cone, only the parts at two sides of the upper part of the cambered shell are reserved, the parts are respectively connected with the fixed rods 1-5 through pins, the radial section of the fixed rods 1-5 is gradually widened along the direction from the front end to the rear end, and when the concave side of the cambered shell turns to the fixed rods 1-5 by taking the pins as the shafts (movable connection points 3-1), the annular electrode 4 can be folded. In a furled state, the inner concave surface of the support body 3 (in a cambered surface shell shape) is tightly attached to the fixing rod 1-5, so that the radial size of the electric cutting ring (particularly the part of the front end which needs to extend into the uterine cavity) reaches the minimum, the electric cutting ring can easily pass through the external opening of the cervix and the internal opening of the uterine cavity, and the problem that the electric cutting ring is easily damaged when passing through the cervical canal and the internal opening of the cervical canal is solved. The lower part of the cambered surface shell is provided with a mounting hole (a fixed connection point 3-2), the end part of the annular electrode 4 can be fastened through a screw, so that the annular electrodes 4 with different sizes can be conveniently mounted (a thin annular electrode is adopted when the uterine cavity is electrically cut to be adhered; a thick annular electrode is adopted when the myoma is electrically cut), and the annular electrodes 4 can be conveniently replaced after being cut and consumed. The cable 5 may extend from the movable connection point 3-1 (e.g., inside the pin) out of the stationary rod 1-5.

Referring to fig. 4 and fig. 6a, as the handle is opened, the second handle body 1-2 pulls the pull wire 1-4, so that the support body 3 (arc casing) drives the ring electrode 4 to rotate towards the front end of the fixing rod 1-5, and the pull-back tension wire 1-6 is pulled away, when the handle is fully opened, the rotation angle (relative to the fixing rod) of the ring electrode 4 is 120 degrees. In the rotating process, once the handle stops opening, the support body 3 (arc shell shape) and the annular electrode 4 are fixed in position under the reverse traction action of the traction wires 1-4 and the pull-back tension wires 1-6, and according to different treatment targets in the uterine cavity, the treatment can be performed by adopting 90 degrees and selecting other different angles (for example, any angle between 45 and 120 degrees). With the closing of the handle, the tensioning wires 1-6 are pulled back to enable the support body 3 to drive the annular electrode 4 to rotate towards the rear end of the fixing rod 1-5 until the support body 3 is tightly attached to the fixing rod 1-5. Because the fixing rods 1-5 with gradually changed radial dimensions are adopted, the tension wires 1-6 can be obliquely installed, so that the extending length of the tension wires 1-6 is effectively reduced, the folding angle of the extending part is reduced as much as possible, and the interference to the operation is reduced.

The use method of the monomer type electrotomy ring comprises the following steps:

as an independent electric cutter, a hysteroscope may be used for examination first. When the electric cutting treatment is needed, one method is to use a vaginal speculum to perform proper uterine expansion according to the tightness of the uterine orifice, generally the uterine orifice is about 6mm, the single electric cutting ring is firstly sent into the uterine cavity according to the position of the uterus for hysteroscopy, then the single electric cutting ring is fixed by one hand, and the hysteroscope is held by the other hand and enters the uterine cavity from one side of the single electric cutting ring. The other method is that a vaginoscope is not used, a hysteroscope is firstly used for examination under the vaginoscope technology, when the electric excision treatment is needed, the hysteroscope is operated by one hand, a single electric excision ring is held by one hand, the single electric excision ring is firstly sent to the position close to the inner opening of the cervical canal along the hysteroscope, the hysteroscope is retracted into the cervical canal, the single electric excision ring is sent into the uterine cavity under the direct vision of the hysteroscope, and then the hysteroscope is sent into the uterine cavity from one side; if the uterine orifice is loose, the single-body type electric excision ring can also be directly sent into the uterine cavity along the hysteroscope.

When the nidus needing electric cutting, such as uterine cavity polyp, uterine cavity adhesion, submucosal myoma, and the like, is detected, the single electric cutting ring is operated under the hysteroscope to treat. The handle is held tightly to open the annular electrode 4, different opening angles of the handle are selected according to the required incision part and depth, when power-on treatment is required, the electrode plate is stepped on by feet, current is led into the annular electrode 4 through the leading-out electrode 6 and the cable 5, and for the single electric cutting ring (using the pull-back tension wires 1-6), except that the fixed rods 1-5 can be used for pull-back or forward pushing, the angle of the annular electrode 4 can be adjusted through opening or drawing-in of the handle, namely, focuses such as polyps, myomas and the like are cut off through rotation of the annular electrode 4, the principle of hoeing is more met, so that the focuses are thoroughly cleared, a better treatment effect is achieved, and the electrified annular electrode 4 can be used for coagulation when necessary in cutting.

Example 2

Referring to fig. 7 and 11, the single body type electric cutting needle of the present embodiment includes a handle, a fixing rod 1-5, a plurality of flexible wires (e.g., synthetic fibers such as nylon, high polymer such as PE, metal alloy material such as titanium steel) having a certain strength and capable of being freely bent, and a circuit system. Unlike embodiment 1, the circuit loop system uses the needle electrode 7 as a cutting electrode, and the supporting body 3 for mounting the needle electrode 7 is in the form of a cylindrical holder, which facilitates both mounting of the needle electrode 7 and connection with the cable 5 led out from the fixing rod 1-5. When the handle is closed, the supporting body 3 (in the form of a cylinder seat) and the needle-shaped electrode 7 are close to the fixed rod 1-5, and the supporting body 3 (in the form of a cylinder seat) and the needle-shaped electrode 7 have smaller radial sizes relative to the fixed rod 1-5, so that the overall radial size of the electric cutting needle (except the handle) is minimized, the electric cutting needle can easily pass through an external cervical orifice and an internal uterine cavity orifice, and the needle-shaped electrode 7 can be prevented from being damaged by touch.

Referring to fig. 9 and 10, the support body 3 (in the form of a cylindrical holder) is connected with the fixing rods 1-5 by pins, and unlike the embodiment 1, the support body 3 (in the form of a cylindrical holder) comprises a cylinder with internal threads, the lower part of the cylinder is fixedly connected with the tail end of the needle electrode 7 by threads, and two inverted L-shaped pins are arranged on the top of the cylinder (a cable connected with one leading-out electrode, a cable connected with the top of the cylinder, and a cable connected with the other leading-out electrode, which are connected on the side wall of the cylinder). When the cylinder turns to the fixed rod 1-5 by taking the pin as an axis (the movable connection point 3-1), the needle electrode 7 can be folded.

Referring to fig. 8 and 12, as the handles are opened or closed, the drawing wires 1-4 move, and the angle of the needle electrode 7 relative to the fixing rod 1-5 is adjusted under the constraint of the force of the drawing and tensioning wires 1-6. Different angles can be selected between 60 and 120 degrees for electrotomy treatment according to the degree of intrauterine adhesion and the size of the fibroid under the mucosa protruding to the uterine cavity.

The use method of the single-body type electric cutting needle is basically the same as that of the single-body type electric cutting ring in the embodiment 1, namely, the angle of the needle electrode 7 is adjusted through opening or closing of the handle, the needle electrode 7 is used for carrying out electric cutting treatment on niduses such as uterine cavity adhesion, submucosal myoma and the like in an electrified state, the principle of the electric cutting treatment from shallow to deep is better met, a better treatment effect is achieved, and the electrified needle electrode 7 can be used for blood coagulation when necessary in cutting.

When the electric cutter (the electric cutting ring or the electric cutting needle) in the above embodiment is used for matching treatment with the hysteroscope, the uterine orifice is pulled into an oval shape. The combined cross-sectional area of the two instruments is 10.25 pi, the cross-sectional area of the uterine opening with the diameter of 6mm is 9 pi, the cross-sectional area of the uterine opening with the diameter of 7mm is 12.25 pi, and for most patients, the uterine opening is about 6mm, so that the uterine dilatation is basically not needed, and the injury to the cervix of the patient can be correspondingly minimized when the uterine dilatation is smaller or even not. Moreover, the hysteroscope and the electric cutter in the above embodiments are operated without the restriction of speculum and cylindrical metal package, and have wider visual field and wider range of motion.

The single type electric cutting ring and electric cutting needle provided by the invention have the following characteristics:

1) the single type electric cutting ring and the electric cutting needle of the invention are more in line with the physiological structure of the uterine cavity of the human body, and the front ends of the single type electric cutting ring and the electric cutting needle are smaller when the single type electric cutting ring and the electric cutting needle are folded in the matching treatment with a hysteroscope (examination mirror), the diameter of the single type electric cutting ring and the electric cutting needle is about 4mm, and the single type electric cutting ring and the electric cutting needle can be independently fed. Therefore, the uterine dilation is reduced in size, the damage to the cervix is smaller, and fewer complications are caused.

2) The single type electric cutting ring and the electric cutting needle have larger moving range for treatment in the uterine cavity, improve the electric cutting effect by replacing the cutting electrode (such as thicker diameter), correspondingly accelerate the operation process and reduce the risk of complications.

3) The single type electric excision ring and the electric excision needle can adjust the angle of the cutting electrode in a larger range, solve the problem that the operation of the existing uterine cavity electric excision mirror is limited by the position of a uterus, the size of an inner opening and a speculum, and can increase the tissue of each electric excision at any time according to the requirement, thereby obviously shortening the time of the electric excision operation and reducing the operation complications.

4) The single type electric cutting ring and the electric cutting needle of the invention basically do not need to expand the uterus and have small damage, so the treatment process can be finished in an outpatient operating room, the treatment cost is reduced, and the good treatment effect can be achieved.

Claims

1. A monomer formula palace chamber electrotome which characterized in that: the device comprises a fixing rod (1-5), a traction wire (1-4), a cutting electrode and an operating handle, wherein a guide sliding sleeve (2) and a supporting body (3) capable of swinging towards any end of the fixing rod (1-5) are arranged on the fixing rod (1-5), the operating handle is arranged at one end of the fixing rod (1-5), the traction wire (1-4) respectively extends along a return channel formed by the guide sliding sleeve (2) at the other end of the fixing rod (1-5) and is connected to the operating handle and the supporting body (3), a tensioning wire (1-6) which extends outwards and is connected to the supporting body (3) is arranged in the fixing rod (1-5), the cutting electrode is arranged on the supporting body (3), and the cutting electrode is connected with a cable (5) extending along the fixing rod (1-5).

2. The unitary uterine cavity electrotome according to claim 1, wherein: the guide sliding sleeve (2) comprises a bent pipe body and a straight pipe body which are connected with each other, the concave side of the bent pipe body covers one end of the fixed rod (1-5), and the straight pipe body extends to the other end of the fixed rod (1-5) provided with the operating handle.

3. The unitary uterine cavity electrotome according to claim 1, wherein: the support body (3) is in a cambered surface shell shape, one end of the support body (3) is in pin joint with the fixed rods (1-5), and the other end of the support body (3) is connected with the cutting electrode.

4. The unitary uterine cavity electrotome according to claim 3, wherein: the cutting electrode adopts a ring-shaped electrode (4), one end of a cable (5) is connected with a leading-out electrode (6) arranged inside or on the outer surface of a fixed rod (1-5), the main body of the cable (5) is arranged inside the fixed rod (1-5), and the other end of the cable (5) extends to the connecting position of the ring-shaped electrode (4) and the support body (3).

5. The unitary uterine cavity electrotome according to claim 1, wherein: the support body (3) is hollow cylindrical, one end of the support body (3) is in pin joint with the fixed rods (1-5), and the other end of the support body (3) is connected with the cutting electrode.

6. The unitary uterine cavity electrotome according to claim 5, wherein: the cutting electrode adopts a needle electrode (7), one end of the cable (5) is connected with a leading-out electrode (6) arranged inside or on the surface of the fixed rod (1-5), the main body of the cable (5) is arranged inside the fixed rod (1-5), and the other end of the cable (5) extends to the support body (5).

7. The unitary uterine cavity electrotome according to claim 1, wherein: the operating handle comprises a pair of mutually hinged handle bodies, the tensioning wires (1-6) are connected with the handle bodies clamped on the corresponding ends of the fixing rods (1-5), and the other handle body is connected with the traction wires (1-4).

8. The unitary uterine cavity electrotome according to claim 1, wherein: the cross-sectional dimension of the fixing rod (1-5) is gradually reduced from one end of the fixing rod (1-5) provided with the operating handle to the other end.

9. The unitary uterine cavity electrotome according to claim 1, wherein: the swing angle of the support body (3) is 30-120 degrees.

10. The unitary uterine cavity electrotome according to claim 1, wherein: the diameter of the cutting electrode is 0.5-1.5 mm.